Question

-24ab+3(4a+b)² при a=√7 , b=√3

Answer 1

-24ab+3(4a+b)=-24ab+3(16a²+8ab+b²)
-24ab+48a²+24ab+3b²=48a²+3b² =48(√7)²+3(√3)²48*7+3*3=3024